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The solubility order for alkali metal fluoride in water is :

Options

  1. ALiF < RbF < KF < NaF
  2. BRbF < KF < NaF < LiF
  3. CLiF > NaF > KF > RbF
  4. DLiF < NaF < KF < RbF

Correct answer

D. LiF < NaF < KF < RbF

Step-by-step solution

Higher the lattice enthalpy lower will be solubilityi.e., lattice enthalpy 1 Solubility Since the lattice enthalpy of alkali metals follow the order Li > Na > K > Rb Hence the correct order of solubility is LiF < NaF < KF < RbF

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